Just gonna answer this one: "2. What is the combat system like? I can't stand the combat system in FF games, but enjoy the action Kingdom Hearts type." The other is too nebulous for me to tackle.
It's definitely nothing like JRPG combat. Gonna guess you haven't played it, but it really reminds me of the Witcher's combat. So, you know each type of combat is done with one button: melee is x, ranged y, and magic b. At the beginning, the system isn't really that deep; just mash whatever button. But the complexity is added through upgrades. So, the first melee upgrade is block. You hold x to defend. The second is flourishes, which lets you do a cool looking attack when you hold x and let go. Then you get chained attacks, which let you string attacks together if you tap x at the right time. I think there's one or two more, which I haven't gotten yet.
Ranged is similar. You get more abilities that get progressively more complicated to pull off. Magic is a bit different. Basically there's a bunch of spells (I think 8?), and they each have 5 levels. Holding the B button down charges up your spell, but it's done pretty interestingly. For these quick-casts, you get one slot per level, so you can have a time-slow spell in the first slot, a fireball spell in the second, and a shock spell in the third level. If you just tap B, you'll cast the time-slow. If you hold it a while, it'll do the lvl2 fire, and hold it longer to get the shock spell. It's actually pretty elegant, even though I haven't leveled magic up that high.
What I really like about the system is that it doesn't beat you over the head with complexity. Explaining it in text like this probably makes it more complicated than it really is and sort of robs you of the feeling I got though. =p I haven't really bothered with ranged, so it's really easy for me: I just tap away at y to fire my crossbow, or hold it to aim. Basically, you're learning each little move one at a time, making the game flow well and keeps the pacing going very well.
Maybe that was too long.